优化对比剂注射方案联合低剂量扫描模式在头颈部CTA中的应用

Application of Optimized Contrast Injection Program Combined with Low-Dose Scanning Mode in Head and Neck CTA

目的 探讨基于患者身高和体重的优化对比剂注射方案结合低剂量扫描在头颈CTA中的应用价值。方法 连续收集100例拟行头颈部CTA扫描的患者随机分成A、B两组,A组采用常规对比剂注射方式和常规剂量扫描方案。B组采用基于患者体重和身高的低对比剂注射方式和低剂量扫描方案。测量两组图像主动脉弓、颈总动脉、颈内动脉、大脑中动脉3个层面动脉血管的CT值和图像噪声,并比较两组图像质量,辐射剂量和碘摄入量,对图像质量进行主观评分和对比剂滞留评分。结果 两组图像质量均可满足临床诊断,但A组辐射剂量高于B组(P<0.05);上腔静脉和锁骨下静脉对比剂滞留伪影大,平均注射对比剂量、碘摄入量、注射速率和碘流率均高于B组(P<0.05)。结论 基于身高和体重的优化对比剂注射方案联合低剂量扫描行头颈CTA具有可行性,值得临床推广应用。

Objective To explore the application value of an optimized contrast injection program based on the patient’s height and weight combined with low-dose scanning in head and neck vascular imaging. Methods 100 collected patients who were to undergo head and neck CTA scans were randomly divided into group A and group B. Group A was treated with conventional contrast medium injection and a conventional dose scanning scheme. Group B adopted a customized low-contrast injection method and low-dose scanning plan based on the patient’s weight and height.The CT values and image noise of arterial vessels at aortic arch,common carotid artery,internal carotid artery and middle cerebral artery of the two groups were measured,and the image quality,radiation dose and iodine intake of the two groups were compared. Subjective score and contrast agent retention score of image quality were performed. Results The image quality of the two groups could meet the clinical diagnosis,but the radiation dose of group A was higher than that of group B(P<0.05);the superior vena cava and subclavian vein exsited large contrast agent retention artifacts.The average injection contrast dose,iodine intake,The injection rate and iodine flow rate were higher than in group B(P<0.05). Conclusion The optimized contrast injection scheme based on height and weight combined with lowdose scanning for head and neck CTA is feasible and worthy of clinical application.